ATM Cassette Shutter Mechanism for Paper Return
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Solution Overview
Problem
ATM cassettes face issues with paper media remaining at the entrance during separation, leading to exposure and potential jams when reconnected, compromising security and reliability.
Innovation Solution
A cassette design featuring a shutter that opens and closes the entrance, utilizing a medium return gear and support portions to forcibly return paper media into the cassette body during separation, preventing exposure and jams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cassette is separated from the cassette receiving portion to enable removal, then the paper medium can be transferred out, but the paper medium may remain at the entrance and be exposed
Solution Approach 1:
The shutter is moved to the closed position before the cassette is fully separated from the cassette receiving portion. This preliminary action ensures that the paper medium is covered and cannot be exposed or accessed during the separation process, resolving the contradiction between easy removal and exposure prevention.
2Ease of operation
If the cassette is separated from the cassette receiving portion, then the cassette can be removed, but the paper medium disposed at the entrance may cause a jam when reconnecting
Solution Approach 1:
The shutter closes the entrance before cassette separation is completed, preliminarily preventing paper medium from being disposed at the entrance. This ensures that when the cassette is reconnected, there is no paper medium left at the entrance to cause a jam, thus resolving the contradiction between ease of operation and reliability.
3Reliability
If a shutter mechanism is added to open and close the entrance, then paper medium exposure and jams are prevented, but the device complexity increases
Solution Approach 1:
The shutter mechanism serves multiple functions: it opens and closes the entrance to prevent paper medium exposure, prevents jams by ensuring the entrance is closed during separation, and works in conjunction with the connection portion to automate the process. By consolidating these functions into a single mechanism, the patent reduces overall system complexity while maintaining high reliability.
Solution Approach 2:
The shutter mechanism is designed to automatically open and close based on the connection and separation of the cassette, without requiring external control systems. The connection portion and shutter work together in a self-service manner, where the mechanical interaction between components triggers the shutter movement, thereby reducing device complexity while achieving reliable paper medium protection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively returns paper media into the cassette, enhancing security and reliability by preventing exposure and jams, and simplifying the structure for various applications without requiring a dedicated power source.
Implementation Method 1
a shutter gear formed at the shutter, the medium return gear portion configured to be connected to the shutter gear
Data Source
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AI summary
A cassette for an automatic teller machine (ATM) is provided, which is capable of returning a paper medium disposed at an entrance of the cassette into the cassette using a moving force of a shutter that closes the entrance, during separation of the cassette from a cassette receiving portion.